87 lines
3.7 KiB
JavaScript
87 lines
3.7 KiB
JavaScript
window.EditorLists = (function () {
|
|
|
|
function detectListPrefix(lineText) {
|
|
var m;
|
|
m = lineText.match(/^(\s*)(- \[[ x]\] )/);
|
|
if (m) return { indent: m[1], prefix: m[2], type: 'task' };
|
|
m = lineText.match(/^(\s*)([-*+] )/);
|
|
if (m) return { indent: m[1], prefix: m[2], type: 'unordered' };
|
|
m = lineText.match(/^(\s*)(\d+)\. /);
|
|
if (m) return { indent: m[1], prefix: m[2] + '. ', type: 'ordered', num: parseInt(m[2], 10) };
|
|
m = lineText.match(/^(\s*)(> )/);
|
|
if (m) return { indent: m[1], prefix: m[2], type: 'blockquote' };
|
|
return null;
|
|
}
|
|
|
|
function continuationPrefix(info) {
|
|
if (info.type === 'task') return info.indent + '- [ ] ';
|
|
if (info.type === 'ordered') return info.indent + (info.num + 1) + '. ';
|
|
return info.indent + info.prefix;
|
|
}
|
|
|
|
function renumberOrderedList(text, fromLineIndex, indent, startNum) {
|
|
var lines = text.split('\n');
|
|
var re = new RegExp('^' + indent.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') + '(\\d+)\\. ');
|
|
var num = startNum !== undefined ? startNum : null;
|
|
for (var i = fromLineIndex; i < lines.length; i++) {
|
|
var m = lines[i].match(re);
|
|
if (!m) break;
|
|
if (num === null) num = parseInt(m[1], 10);
|
|
var newNumStr = String(num);
|
|
if (m[1] !== newNumStr) {
|
|
lines[i] = indent + newNumStr + '. ' + lines[i].slice(m[0].length);
|
|
}
|
|
num++;
|
|
}
|
|
return lines.join('\n');
|
|
}
|
|
|
|
function handleEnterKey(text, cursorPos) {
|
|
var before = text.slice(0, cursorPos);
|
|
var after = text.slice(cursorPos);
|
|
var lineStart = before.lastIndexOf('\n') + 1;
|
|
var lineEnd = text.indexOf('\n', cursorPos);
|
|
if (lineEnd === -1) lineEnd = text.length;
|
|
var fullLine = text.slice(lineStart, lineEnd);
|
|
var info = detectListPrefix(fullLine);
|
|
if (!info) return null;
|
|
|
|
var contentAfterPrefix = fullLine.slice(info.indent.length + info.prefix.length);
|
|
if (contentAfterPrefix.trim() === '') {
|
|
var newText = text.slice(0, lineStart) + '\n' + after;
|
|
var newCursor = lineStart + 1;
|
|
if (info.type === 'ordered') {
|
|
var lineIndex = text.slice(0, lineStart).split('\n').length;
|
|
newText = renumberOrderedList(newText, lineIndex, info.indent);
|
|
}
|
|
return { text: newText, cursor: newCursor };
|
|
}
|
|
|
|
var cont = continuationPrefix(info);
|
|
var newText = before + '\n' + cont + after;
|
|
var newCursor = cursorPos + 1 + cont.length;
|
|
if (info.type === 'ordered') {
|
|
var insertedLineIndex = before.split('\n').length;
|
|
newText = renumberOrderedList(newText, insertedLineIndex, info.indent);
|
|
}
|
|
return { text: newText, cursor: newCursor };
|
|
}
|
|
|
|
function deleteOrderedLine(text, cursorPos) {
|
|
var lineStart = text.lastIndexOf('\n', cursorPos - 1) + 1;
|
|
var lineEnd = text.indexOf('\n', cursorPos);
|
|
if (lineEnd === -1) lineEnd = text.length;
|
|
var fullLine = text.slice(lineStart, lineEnd);
|
|
var info = detectListPrefix(fullLine);
|
|
if (!info || info.type !== 'ordered') return null;
|
|
|
|
var newText = text.slice(0, lineStart) + text.slice(lineEnd === text.length ? lineEnd : lineEnd + 1);
|
|
var newCursor = lineStart;
|
|
var fromLineIndex = text.slice(0, lineStart).split('\n').length - 1;
|
|
newText = renumberOrderedList(newText, fromLineIndex, info.indent, info.num);
|
|
return { text: newText, cursor: Math.min(newCursor, newText.length) };
|
|
}
|
|
|
|
return { handleEnterKey: handleEnterKey, deleteOrderedLine: deleteOrderedLine };
|
|
})();
|